While the exact date is unknown, the oldest abacus found was on the Greek island of Salamis in 1846 that dates back to 300 BC.
The very first calculator ever used could be an abicus, an electronic calculator, or even your brain. The first calculator invented was the abacus.
An Abicus
abicus - it is a toy used for counting
jv
invented in 500BC before electricity was invented
The CD was invented in 2001 Thomas clamps invented it.
Gloria Mejia invented it and she invented it in 1998
When and where were snickerdoodles invented Why were snickerdoodles invented
who invented the washboard?
Yes, the computer is invented.
Invented is the past participle of the verb invent. verb /past /past participle = invent /invented /invented
The Chinese invented the Rudder.it was invented by the Chinese